| 15901 | K.M.A. Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 15902 | K.W.A., Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 15903 | K.W.S. Oil Development | Chanute, KS 66720 | Oil Operator | May 2004 |
| 15904 | K2 America Corporation | Calgary, AB T3P 3S8 | Oil & Gas Operator | Nov 2017 |
| 15905 | K2 Petroleum, Inc. | San Antonio, TX 78239 | Oil & Gas Operator | Feb 2026 |
| 15906 | K3 Oil & Gas Operating Company | Spring, TX 77383 | Oil & Gas Operator | Nov 2025 |
| 15907 | K3 Productions LLC | Houston, TX 77269 | Oil & Gas Operator | Feb 2026 |
| 15908 | K3 Resources, Inc. | Garden City, KS 67846 | Gas Operator | Aug 2013 |
| 15909 | Ka Energy Op Co. LLC | Oakland, CA 94605 | Oil & Gas Operator | Oct 2021 |
| 15910 | Ka Tex Energies, Inc. | Iola, TX 77861 | Oil & Gas Operator | May 1999 |
| 15911 | Ka-Lyn Oil & Gas, Inc. | | Oil & Gas Operator | Jul 1990 |
| 15912 | Kabco Oil & Gas Company | Longview, TX 75604 | Oil & Gas Operator | Jun 2018 |
| 15913 | Kabco Production | | Oil & Gas Operator | Sep 1999 |
| 15914 | Kabco-Pennington | | Oil & Gas Operator | Oct 1996 |
| 15915 | Kachina Exploration Inc | Cheyenne, WY 82003 | Oil & Gas Operator | Jul 2000 |
| 15916 | Kachina Oil & Gas Inc. | Austin, TX 78766 | Oil & Gas Operator | Jul 2002 |
| 15917 | Kachina Oil Comp | | Oil & Gas Operator | Jan 1988 |
| 15918 | Kachina Oil Company | Wichita, KS 67202 | Gas Operator | Sep 1998 |
| 15919 | Kadane & Sons | | Oil & Gas Operator | Sep 2000 |
| 15920 | Kadane Corporation | Dallas, TX 75205 | Oil & Gas Operator | Feb 2026 |
| 15921 | Kadane Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 1998 |
| 15922 | Kahan & Assoc In | | Oil Operator | Dec 1996 |
| 15923 | Kahan & Associates Inc | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2025 |
| 15924 | Kahan Louis | Tulsa, OK 74101 | Oil & Gas Operator | May 1994 |
| 15925 | Kahlenberg Oil And Gas LLC | Conroe, TX 77304 | Oil Operator | Feb 2026 |
| 15926 | Kahn George Operating Co | Seminole, OK 74818 | Oil & Gas Operator | Nov 2000 |
| 15927 | Kaib & Kaib | Zanesville, OH 43701-6251 | Gas Operator | Dec 2025 |
| 15928 | Kain Petroleum Company | Pearsall, TX 78061 | Gas Operator | May 2011 |
| 15929 | Kain Petroleum, LLC | Pearsall, TX 78061 | Oil & Gas Operator | Feb 2026 |
| 15930 | Kainz, David R. | Ottawa, KS 66067 | Oil Operator | Aug 2009 |
| 15931 | Kaiser Aluminum Exploration Co | | Oil & Gas Operator | Dec 1986 |
| 15932 | Kaiser Energy Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 1990 |
| 15933 | Kaiser Farms | Edmond, OK 73025-9489 | Oil & Gas Operator | Nov 2025 |
| 15934 | Kaiser Investments | Sand Springs, OK 74063 | Oil & Gas Operator | Sep 2003 |
| 15935 | Kaiser Oil (U.S.) LTD. | | Oil & Gas Operator | Apr 1983 |
| 15936 | Kaiser Operating, LLC | | Oil & Gas Operator | Dec 2025 |
| 15937 | Kaiser-Francis O | | Oil & Gas Operator | Oct 1995 |
| 15938 | Kaiser-Francis Oil | | Oil Operator | Nov 1995 |
| 15939 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Feb 2026 |
| 15940 | Kal Energy Inc | Oklahoma City, OK 73116-3606 | Oil Operator | Nov 2014 |
| 15941 | Kal Oil Operations | | Oil Operator | Jun 2025 |
| 15942 | Kala Oil Company | Sundown, TX 79372 | Oil & Gas Operator | Feb 2026 |
| 15943 | Kalco Development Corporation | | Gas Operator | Dec 1989 |
| 15944 | Kalda Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 1994 |
| 15945 | Kaler Energy Corp. | Boerne, TX 78006 | Oil & Gas Operator | Feb 2026 |
| 15946 | Kaler Oil Company | Gainesville, TX 76240 | Oil & Gas Operator | Dec 2024 |
| 15947 | Kalkaska Oilfield Services Inc | | Oil Operator | Aug 2006 |
| 15948 | Kalkman Oil Corporation | Duncan, OK 73533 | Oil & Gas Operator | Nov 2025 |
| 15949 | Kallina, Carlton J. | Houston, TX 77269 | Gas Operator | Feb 2026 |
| 15950 | Kalos Corporation | Tyler, TX 75701 | Oil & Gas Operator | Feb 2026 |
| 15951 | Kalstra Energy LTD | Denver, CO 80222-5938 | Gas Operator | Jun 2018 |
| 15952 | Kamc Oil & Gas LLC | Queen Creek, AZ 85142 | Oil Operator | Jan 2011 |
| 15953 | Kamco Hot Oil Service Inc | Cement, OK 73017 | Oil & Gas Operator | Dec 2025 |
| 15954 | Kamco Limited | Salt Lake City, UT 84105 | Oil Operator | Sep 2016 |
| 15955 | Kamlok Oil & Gas, Inc. | Houston, TX 77240 | Oil & Gas Operator | Jun 1996 |
| 15956 | Kamlok, Inc. | | Oil Operator | Nov 1991 |
| 15957 | Kammer, Walter A. | Holland, NY 14080 | Gas Operator | Dec 2024 |
| 15958 | Kampresco Energy, LLC | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 15959 | Kan-Cal Enterpri | | Oil Operator | Dec 1988 |
| 15960 | Kan-Ex Incorpora | | Oil & Gas Operator | Jan 1985 |
| 15961 | Kan-Tex Drilling Corp. | | Oil Operator | Dec 1981 |
| 15962 | Kan-Texco Incorp | | Oil & Gas Operator | Dec 1994 |
| 15963 | Kana Resources, Inc. | Dallas, TX 75243 | Oil & Gas Operator | Aug 2003 |
| 15964 | Kanaco Oil Company | | Oil Operator | Apr 2025 |
| 15965 | Kanalta Resources, LTD. | Yates Center, KS 66783 | Oil Operator | Jan 1998 |
| 15966 | Kanan Oil & Gas, Inc. | | Oil & Gas Operator | Oct 1987 |
| 15967 | Kandletop Operating, LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Nov 2025 |
| 15968 | Kaneb Energy Company | | Oil & Gas Operator | Jan 1986 |
| 15969 | Kaneb Oil & Gas | | Oil & Gas Operator | Oct 1987 |
| 15970 | Kaneb Oil & Gas Company | | Oil & Gas Operator | Nov 1985 |
| 15971 | Kaneb Operating Company | Dallas, TX 75265-0283 | Oil & Gas Operator | Dec 1995 |
| 15972 | Kaneb Operg Co. LTD. PTN. | | Oil & Gas Operator | Aug 1988 |
| 15973 | Kanik, Anthony S Dba Kanik Oil Co | McLeansboro, IL 62859 | Oil Operator | Dec 2023 |
| 15974 | Kanmap Incorpora | | Oil & Gas Operator | Dec 1995 |
| 15975 | Kanmap, A Kansas Corporation | Independence, KS 67301 | Oil & Gas Operator | Aug 2025 |
| 15976 | Kano Partners | | Oil Operator | Sep 1989 |
| 15977 | Kanok Energy LLC | Henryetta, OK 74437 | Gas Operator | Nov 2023 |
| 15978 | Kanokla Oil & Gas Corporation | Wellington, KS 67152-0444 | Oil & Gas Operator | Nov 2025 |
| 15979 | Kanpetro, Inc. | | Oil Operator | May 1991 |
| 15980 | Kansas Bourse In | | Oil & Gas Operator | Apr 1985 |
| 15981 | Kansas City Oil, LLC | Parkville, MO 64152 | Oil Operator | Aug 2025 |
| 15982 | Kansas Crude Investments LLC | Hays, KS 67601 | Oil Operator | Sep 2025 |
| 15983 | Kansas Crude Oil | | Oil Operator | Dec 1987 |
| 15984 | Kansas Crude Resources, LLC | | Oil Operator | Sep 2025 |
| 15985 | Kansas Crude, Inc. | Hutchinson, KS 67501 | Oil & Gas Operator | Apr 2003 |
| 15986 | Kansas Energy Company, L.L.C. | Sedan, KS 67361 | Oil & Gas Operator | Sep 2025 |
| 15987 | Kansas Gas Co., Inc. | Wichita Falls, TX 76310 | Gas Operator | Sep 2025 |
| 15988 | Kansas Gas Purchasing | Salina, KS 67401 | Oil & Gas Operator | May 1995 |
| 15989 | Kansas Gas Service | | Oil Operator | Nov 1996 |
| 15990 | Kansas Gas Suppl | | Gas Operator | Sep 1984 |
| 15991 | Kansas Horizon O | | Oil & Gas Operator | Jun 1994 |
| 15992 | Kansas Horizon Oil, Inc. | Windom, KS 67491 | Oil Operator | May 2017 |
| 15993 | Kansas Ka-Tex Joint Venture, A General Partnership | San Antonio, TX 78216 | Gas Operator | Aug 2011 |
| 15994 | Kansas MB Project, LLC | Skiatook, OK 74070 | Oil & Gas Operator | Sep 2024 |
| 15995 | Kansas Natural G | | Oil & Gas Operator | Dec 1996 |
| 15996 | Kansas Natural Gas Operating, LC | Hays, KS 67601 | Gas Operator | Sep 2025 |
| 15997 | Kansas Natural Gas, Inc. | Hays, KS 67601 | Gas Operator | Sep 2025 |
| 15998 | Kansas Oil & Gas Corporation | Woodland HLS, CA 91367 | Oil & Gas Operator | Feb 2001 |
| 15999 | Kansas Oil Company | Kansas City, KS 66117 | Oil Operator | May 1997 |
| 16000 | Kansas Oil Prope | | Oil & Gas Operator | Sep 1991 |